yowcow

# Create a certificate
sudo letsencrypt certonly --webroot \                                                                                        ~
  -w /srv/path/to/document/root \
  -d my.working.fqdn

# Help on renew. See Also: https://certbot.eff.org/docs/using.html#re-running-certbot
letsencrypt --help renew

# Update created certificates
sudo letsencrypt renew --agree-tos \

yowcow

mongodump --port <PORT like 27018> --db <DATABASE> --collection <COLLECTION>

yowcow

#!/bin/bash

# Colors:
#  1: Red
#  2: Greed
#  3: Yellow
#  4: Blue
#  5: Magenta
#  6: Cyan
#  7: White

yowcow

const sliceTodos = todos =>
  todos.length <= 3
    ? [todos, []]
    : [todos.slice(0, 3), todos.slice(3)]

const square = (x, callback) =>
  setTimeout(() => callback(x ** 2), 1000)

const squarePromise = x =>
  new Promise(resolve => square(x, res => resolve(res)))

yowcow

const expect = require('expect')

const groupItems = (array = [], count) =>
  array.reduce(
    (prev, cur) => {
      const lastIndex = prev.length - 1
      return lastIndex === -1 ? [[cur]]
        : prev[lastIndex].length === count ? [...prev, [cur]]
        : [...prev.slice(0, -1), [...prev[lastIndex], cur]]
    },

yowcow

import assert  from "assert"
import co      from "co"
import http    from "http"
import request from "request"

describe("request", () => {

  it("should make a GET request", () => co(function *() {
    const server = http.createServer((req, res) => res.end("あばば"))
    server.listen(5000)

yowcow

curl -LO http://ftp.gnu.org/gnu/ncurses/ncurses-6.0.tar.gz
curl -LO https://github.com/libevent/libevent/releases/download/release-2.1.8-stable/libevent-2.1.8-stable.tar.gz
curl -LO https://github.com/tmux/tmux/releases/download/2.3/tmux-2.3.tar.gz

tar xzf ncurses-6.0.tar.gz && \
  cd ncurses-6.0 && \
  ./configure --prefix $HOME/local && \
  make && make install && \
  cd ..

yowcow

use strict;
use warnings;
use Benchmark qw(cmpthese);
use HTTP::Message::PSGI;
use HTTP::Request::Common;
use Plack::Response;
use Plack::Test;

my $app_with_plack_response = sub {
    my $res = Plack::Response->new(200);

yowcow

use strict;
use warnings;
use Benchmark qw(cmpthese);

my @keys = 1 .. 20;
my %key_map = map { $_ => 1 } @keys;

cmpthese(
    5_000_000,
    {   'with grep()' => sub {

yowcow

use strict;
use warnings;
use Benchmark qw(cmpthese);

my @keys = 1 .. 20;
my %key_map = map { $_ => 1 } @keys;

cmpthese(
    5_000_000,
    {   'with grep()' => sub {